| Original message
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Replies:
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| dcdraftworks
|  "Re(1):wrong color wires from wall"
, posted Tue 1 Apr 21:08  
Remember to turn off 120VAC switch to the HVAC equipment before changing t-stat.
Never assume that a wire color is correct for the function it should perform; check it out first The same goes for high voltage control wiring and motor terminals .
* {Terminal name}, {color}, {function}
* (R), Red, hot side of transformer.
* (C) Common side of transformer (See B)
* (Y), Yellow, Compressor activity (cooling or cooling and heating on a heat pump).
* (W), (W1), (W2) White, "Heat" (gas burner, oil burner , electric heat, (auxiliary heat on a heat pump including defrost output from the outdoor unit to activate electric heat and turn on the AUX. heat lamp). Note: some thermostats require a jumper from "W" to "Y" for heat pump operation.
* (G), Green, furnace blower fan. (needed for air conditioning, heat pumps and some electric furnaces). NOTE: on most thermostats the "G" and "Y" are connected together at all times when the fan switch is in the "Auto" mode!
* (O), Orange , Energize to cool (used for reversing valve on heat pumps)
* (B), Blue or Orange, Energize to heat (used on some systems, Rheem/Ruud is notorious for this).
* (B) or (X), Blue, brown or Black, common side of transformer. Needed on some electronic thermostats or if you have indicator lamps. Do not confuse with (B) Reversing valve (energize to heat) above. York and Trane like to use (B) as common.
* (E), blue, pink, gray or tan, emergency heat relay on a heat pump. Active all the time when selected, usually not used.
* (T), Tan or Gray, outdoor anticipator reset.
* Used on GE/Trane/American Standard and some Carrier Products. (W2), Pink or other color, second stage of heat (may be same as (W) on heat pump or fossil fuel system).
* (Y2), Blue or Pink, second compressor stage.
* (L), Blue, brown, tan or gray service indicator lamp.
* Numbers, see manufacture's diagrams but can be stages of electric heat especially on York/Borg Warner/Coleman-Evcon, Frasier Johnson/ Air-pro.
* (X2), Second stage of Electric Heat on GE/Trane/American Standard. See link above. Also used as indicator lamp or misc. contacts on other systems.
* Learn more about a Heat Pump Thermostat.
Warning: Do not confuse "B" Common
(GE, York and Trane)!
With "B" Energize reversing valve to heat (Rheem/Ruud/Weatherking)!
Elmo
dcdraftworks@sbcglobal.net
CAD Drafting of Mechanical Systems
Marin County California
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| theduke03
| "Re(1):wrong color wires from wall" , posted Tue 1 Apr 17:17
follow those wires into your indoor unit/furnace and check the terminals that wires attatch to. these terminals should correspond with the terminals on the stat. I would definately not go by color unless I disconnected it myself.
You can't put a price on comfort! Be Safe.
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| | dwcaveney
| "Be specific about model" , posted Tue 1 Apr 21:42:
Can't find that model # anywhere.
What is it? Furnace with Air conditioning, Heatpump? BTU, CFM, install(up, down, right, left) Sounds like a heat pump connection?
Some Honeywells the common black is not used and the white wire (which you don't have) connnects to W (which is also B/O for heat pump)
When you jump R to W (white)that is a call for heat. See if you have 24VAC across Black and Red. Maybe someone just substituted black for white. (real dumb) There is an ongoing attempt by the industry to standardize the connection colors.
If you have a heat pump that t-stat is not compatible!
Refer to post by dcdraftworks
DW
[this message was edited by dwcaveney on Tue 1 Apr 22:54] |
| | dwcaveney
| "How you doing Houston?" , posted Tue 1 Apr 23:02:
Houston204
I was just about ready to refer Dave to you. What were you doing when the site was down? Do you know what happened with the license? How much does the license cost?
Regards,
DW
[this message was edited by dwcaveney on Tue 1 Apr 23:10] |
| | Houston204
| "Re(1):How you doing Houston?" , posted Tue 1 Apr 23:31
I was going to bed early and getting in to work earlier. But I was going nutz.
I wished that I had more email addresses. I had an old one for Yuri that didn't work and one for Static.
I know nothing about web hosting. We had a similar problem with our truck tracking service. They now have a new suffix (instead of .com).
"Tip of the Day" Remember to remove power first.
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| | theduke03
| "Re(3):wrong color wires from wall" , posted Tue 1 Apr 18:55
Colors are truly meaningless. those wires should correspond to a letter inside the unit(R,W,Y,G). Usually:
R=red
W=white
Y=yellow
G=green
Maybe black is substituted for white but referring to previous post will confirm this.
You can't put a price on comfort! Be Safe.
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